Yamaha DSP-A3090 Mode D'emploi page 7

Unpacking
If you haven't already done so, carefully remove this unit and its
accessories from the box and wrapping material. You should find the
unit itself and the following accessories.
Remote control
GETTING STARTED
Batteries
User program sheets
Installing the Remote Control Unit Batteries
Since the remote control unit will be used for many of this unit's
control operations, you should begin by installing the supplied
batteries.
1. Turn the remote control unit over and slide the battery
compartment cover downward in the direction of the arrow.
2. Insert the batteries (LR6, AA, UM-3 type), being careful to align
them with the polarity markings on the inside of the battery
compartment.
3. Close the battery compartment cover.
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